Meter-testing cut-out.



" T1 E. MURRAY.

METER TESTING CUT-OUT.

APPLICATION FILED DEc.s. 112.

2 SHEETS-SHEET I. I

1,219,132. PatentedMar.13,1917

T. E. MURRAY.

METERTESTING CUT-OUT.

APPLICATION FILED DEC.5, 192. I 1,21 9,132. Patented Mar.13,1917.

2 SHEETS-SHEET 2- EL ME 11 ii UNITED STATES PATENT orrion THOMAS E.'MURRAY, 01 NEW YORK, N. Y.

METER-TESTING CUT-OUT.

Specifieation of Letters Patent.

Patented Mar. 1a, 1917.

Application filed December 5, 1912. Serial No. 735,051.

To allwlwm 2'6 may concern:

Be it known that l Tnouas E. MURRAY, a .citizen of the l nited States,residing at New York, in the county of New York and State of New York,have invented a :ertain new and useful Improvement in hIeter-Testing(at-Outs, of which the following is a specification.

Fig. 5 is a side view of a part of the metercasing showing the cover inplace.

Similar numbers and letters of reference indicate like parts.

A is the meter casing, B and C- are the field coils, and D is thepotential coil. ()n the meter casing and preferably integral therewithis a. box E, having an opening F which is closed by the cover plate G,Fig. Extending upward from the rear wall of the box E is a fixed bolt Hwhich passes through the opening. in the cover G when the same is inplace. and receives a fastening nut I.

Two of the meter field coil terminals, namely 1 and 2, pass throughinsulating bushings 3 in the wall of box E. and are secured in metaltubes l by screws 5. The other two terminals (3 and 7 of the field coilspass tl'irough similar insulating bushings 8 and are secured to metalsockets 9. The tubes and sockets 9 areinsulatcd respectively by thebushings 3 and S from the metal of the casingA.

The service leads 10 and 11- have interposed in them the usual fuse plu;l2. and after passing through insulating bushings 1?) are connected tothe tubes 4 by screws H. The service leads 15 and 1.6 are connected tothe load 17 and are fastened at their ends in metal blocks 18. ()n,saidblock-s 18. {U1 rods 19, 20. which extend through insulating bushings'21 into the box E and termi-' box E is in place.

inwardly through their bushings until the heads enter the sockets 9 whencircuit be comes established from the service leads through the meter tothe load in the usual way.

When it is desired to break circuit be tween the service leads and themeter, the rods 19,20 are slid outwardly in their bushings to withdrawthe heads 22 from the sockets 9, as shown in Fig. 1. This, of course,may he done while the cover G of the gang plugs shown in Figs. 2 and 3are put in position as follows;

The gang plug J, Fig. 2, has a support K of insu ating material,provided with a handle. L. On the under side of said plug are four pairsof contacts, M, N, O, P. The

When it is desired l to test the meter the cover G is removed and pairsM, P, are connected by the-conductor Q. The pairs N, O, are connected bythe conductor R. The pairs M, N, are connected by a conductor S, inwhich is interposed a voltmeter V, The gang plug T, Fig. 3, has

a support of insulating material U, from which depend two pairs ofcontacts W, X,

Said contacts 'are connected to the annneter Y and artificial load Z.

The rods 19 and. 20 are drawn outwardly so as to remove the split-heads22 from the. sockets 9, as shown in Fig. 1. The gang plug J is put inposition as shown in Fig. 4; that iswith the pairs of contacts 0, P,cooperating with the heads.22, and the contacts M, X, cooperating withthe metal tubes 4 which here serve as contact blocks. The gang plug T isplaced with its pairs of con tacts \V'. X, respectively, upon ;the metalsockets 9. In this way direct connection is established from the serviceleads 10, 11,

through the conductors R, Q, to the load ings a re, taken the gang plugsare removed;

cover replaced, and the heads 22 reinserted in the sockets 9 to restorethe running conditions.

Particular attention is called to the fact that the sockets 9 and themovable heads 22 are completely inclosed in the box E which, as stated.may be made integral with the meter casing, and that thehe'ads by meansof the rods 19, 20, are operated from outside of said box. All of theterminals whereby the meter is connected-to the leads are compi telyshielded, whether said terminals be fix d or movable.

I claim:

1. In combination with the field coils of an electric meter, andaninclosing case therefor, contact blocks outside of said caserespectively connected to twqterminals of said field coils, lineconductor {onnected to said blocks, tubular sockets on the exterior ofsaid case connected to the remaining field coil terminals, rods slidablysupported in front of said sockets, load conductors connected to saidrods, heads on said rods fitting said sockets, a gang plug havingcontacts cooperating with said contact blocks and 'said heads,connections on said plug and sockets, an

inclosing said coils, contact blocks secured in said second compartment,insulated from said second compartment, supported on a wall thereof andconnected to the remaining fieldlcoil terminals, rods slidably supportedinflthe opposite wall of said second compartment, load conductorsconnected to said rodslheads on'said rods fitting said sockets, a igangplug having contacts cooperatin w' th said contact blocks and saidheafs, co nections on said plug and between the cont cts thereof forcutting the field coils out, of line circuit, and a voltmeter connectionacross the line, a second gang plug havin contacts cooperating with saidan ammeter connection on said second plug and between said plugcontacts. In testimony whereof I have atlixed my signature in presenceof two witnesses.

" THOMAS E. MURRAY.

Witnesses:

GERTRUDE T. Form-1n,

Mar T. McGAaar.

